SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION CF (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities			$ (14,860)	$ 55,684
Capital expenditures	$ (17,860)	$ (196,376)	(119,726)	(343,365)
Proceeds from asset dispositions	2,525	3,045	14,344	19,152
Deposits on assets held for sale			290	0
Net cash provided by (used in) investing activities			(105,092)	(324,213)
Proceeds from borrowings			360,240	910,421
Debt issuance costs			(3,883)	0
Repayment of debt			(243,677)	(567,121)
Dividends paid			(7,366)	(35,627)
Increases (decreases) in cash related to intercompany advances and debt			0	0
Partial prepayment of put/call obligation			(38)	(42)
Acquisition of noncontrolling interest			0	(7,311)
Dividends paid to noncontrolling interest			(2,533)	(153)
Payment of contingent consideration			(10,000)	(8,000)
Tax benefit related to stock-based compensation			0	44
Net cash provided by financing activities			92,743	292,211
Effect of exchange rate changes on cash and cash equivalents			(5,942)	4,080
Net increase (decrease) in cash and cash equivalents			(33,151)	27,762
Cash and cash equivalents at beginning of period			104,310	104,146
Cash and cash equivalents at end of period	71,159	131,908	71,159	131,908
Consolidations, Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities			(2,947)	0
Capital expenditures			0	0
Proceeds from asset dispositions			0	0
Deposits on assets held for sale			0
Net cash provided by (used in) investing activities			0	0
Proceeds from borrowings			0	0
Debt issuance costs			0
Repayment of debt			0	0
Dividends paid			0	0
Increases (decreases) in cash related to intercompany advances and debt			0	0
Partial prepayment of put/call obligation			0	0
Acquisition of noncontrolling interest				0
Dividends paid to noncontrolling interest			0	0
Payment of contingent consideration			0	0
Tax benefit related to stock-based compensation				0
Net cash provided by financing activities			0	0
Effect of exchange rate changes on cash and cash equivalents			0	0
Net increase (decrease) in cash and cash equivalents			(2,947)	0
Cash and cash equivalents at beginning of period			0	0
Cash and cash equivalents at end of period	(2,947)	0	(2,947)	0
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities			(88,396)	(111,132)
Capital expenditures			(15,385)	(24,633)
Proceeds from asset dispositions			0	0
Deposits on assets held for sale			0
Net cash provided by (used in) investing activities			(15,385)	(24,633)
Proceeds from borrowings			243,900	893,025
Debt issuance costs			(2,925)
Repayment of debt			(218,900)	(542,900)
Dividends paid			(7,010)	(35,627)
Increases (decreases) in cash related to intercompany advances and debt			55,910	(178,140)
Partial prepayment of put/call obligation			(38)	(42)
Acquisition of noncontrolling interest				0
Dividends paid to noncontrolling interest			0	0
Payment of contingent consideration			0	0
Tax benefit related to stock-based compensation				44
Net cash provided by financing activities			70,937	136,360
Effect of exchange rate changes on cash and cash equivalents			0	0
Net increase (decrease) in cash and cash equivalents			(32,844)	595
Cash and cash equivalents at beginning of period			35,241	126
Cash and cash equivalents at end of period	2,397	721	2,397	721
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities			39,771	104,553
Capital expenditures			(21,093)	(258,365)
Proceeds from asset dispositions			12,894	15,192
Deposits on assets held for sale			290
Net cash provided by (used in) investing activities			(7,909)	(243,173)
Proceeds from borrowings			109,890	0
Debt issuance costs			0
Repayment of debt			(4,494)	0
Dividends paid			4	0
Increases (decreases) in cash related to intercompany advances and debt			(140,655)	138,564
Partial prepayment of put/call obligation			0	0
Acquisition of noncontrolling interest				0
Dividends paid to noncontrolling interest			0	0
Payment of contingent consideration			0	0
Tax benefit related to stock-based compensation				0
Net cash provided by financing activities			(35,255)	138,564
Effect of exchange rate changes on cash and cash equivalents			0	0
Net increase (decrease) in cash and cash equivalents			(3,393)	(56)
Cash and cash equivalents at beginning of period			3,393	884
Cash and cash equivalents at end of period	0	828	0	828
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities			36,712	62,263
Capital expenditures			(83,248)	(60,367)
Proceeds from asset dispositions			1,450	3,960
Deposits on assets held for sale			0
Net cash provided by (used in) investing activities			(81,798)	(56,407)
Proceeds from borrowings			6,450	17,396
Debt issuance costs			(958)
Repayment of debt			(20,283)	(24,221)
Dividends paid			(360)	0
Increases (decreases) in cash related to intercompany advances and debt			84,745	39,576
Partial prepayment of put/call obligation			0	0
Acquisition of noncontrolling interest				(7,311)
Dividends paid to noncontrolling interest			(2,533)	(153)
Payment of contingent consideration			(10,000)	(8,000)
Tax benefit related to stock-based compensation				0
Net cash provided by financing activities			57,061	17,287
Effect of exchange rate changes on cash and cash equivalents			(5,942)	4,080
Net increase (decrease) in cash and cash equivalents			6,033	27,223
Cash and cash equivalents at beginning of period			65,676	103,136
Cash and cash equivalents at end of period	$ 71,709	$ 130,359	$ 71,709	$ 130,359